ALLJOYN-2266: Move Rendezvous server SSL certificates to alljoyn_core.

Also made SslSocket constructor take the root and CA certificates as
parameters.

Change-Id: I145e1d4795c895e48e999db092f824ae2c4254cd
ALLJOYN-2312 Serial Line AllJoyn Protocol (SLAP) implemented over UART.

Change-Id: I467d801b859acfddcb28c296dec2eec111a005a6